Voon, Pauline and Choi, Jin Cheol and Hayashi, Kanna and Milloy, M-J and Buxton, Jane and Kerr, Thomas (2021) The effect of depressive symptoms on pain in a substance-using population with persistent pain: a cross-sectional cohort study. BMC Psychiatry, 21, p. 416. doi: 10.1186/s12888-021-03424-7.